Product Description; Description Of The Appliance; Safety Devices; Proper Use - Riello Array AR 399 SE Installation, Operation And Service Manual

2 PRODUCT DESCRIPTION

2.1 Description of the appliance

The Array AR SE it is a condensing, pre-mixed thermal module
consisting in a modulating thermal element.
It's available in two models of power: 399.220 BTU/hr (117 kW) and
500.000 BTU/hr (146.5 kW).
Optimal combustion management supports high thermal effi-
ciencies (Over 95%) and low polluting emissions.
The boiler is designed for sealed chamber operation.
The appliance in standard configuration is for indoor installation.
The appliance's key technical features are
− helicoidal heat exchanger with a double coil smooth stain-
less steel pipe, to guarantee good corrosion resistance and
the option of operating with high ∆ts (up to 72°F [40°C]),
reducing system set-up times;
− maximum exhaust flue exit temperature 212°F [100°C];
− microprocessor management and control with self-diagnos-
tics, shown by means of a display, and logging of main errors;
− Anti-Freeze function;
− pre-settings for room/heat demand thermostat for low and
high temperature ranges;
− option to manage a CH circuit and a DHW circuit with stor-
age tank;
− high-efficiency and high residual discharge head circulator;
− climate control function (available only when using the
outdoor temperature sensor accessory).

2.2 Safety devices

All appliance functions are electronically controlled by a dual pro-
cessor technology board.
Any malfunction results in the appliance being shut down and the
automatic closure of the gas valve.
The following is installed on the CH water circuit:
− Safety high-limit thermostat.
− Flow sensor capable of monitoring the main heating cir-
cuit's flow on an ongoing basis and of stopping the appli-
ance in the event of insufficient flow.
− Temperature sensors on supply and return lines that mea-
sure the temperature difference (∆t) between input and
output fluid and allow the boiler to fire when a demand
is made.
− Minimum Water Pressure Switch (set to 7 psi/0.5 bar).
− LWCO.
The following is installed on the combustion circuit:
− Gas solenoid with pneumatic gas flow compensation de-
pending on the suction line's air flow rate.
− Ignition/detection electrode.
− Flue gas temperature sensor.
− Flue gas pressure switch
− Air pressure switch
− Condensate pressure switch
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WARNING: The triggering of safety devices indicates the mal-
function of a potentially hazardous situation. Therefore, contact
a service agency immediately. After a brief pause, it is possible
to try and restart the appliance (see section " Initial startup").
9
WARNING: Safety devices must be replaced a qualified install-
er, service agency or gas supplier, using only original parts.
Refer to the spare parts catalogue supplied with the appli-
ance. After making the repair, check that the appliance is
working properly.
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WARNING: The appliance must not be put in service, even
temporarily, when tampered safety devices are not in opera-
tion or have been with.
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A hot water boiler installed above the radiation level or as re-
quired by the Authority having jurisdiction, must be provided
with a low water cutoff device either as part of the boiler or at
the time of boiler installation.

2.3 Proper Use

► The Array boilers are designed for large residential, commercial
and industrial applications.
► The Array boilers are delivered in compliance with CSD-1 Com-
mercial applications.
► The appliance may only be installed in closed loop hot water
central heating systems.
► Any other purpose is considered improper use. Any resulting
damage is excluded from the manufacturer's warranty.
► In some heating applications like pool, spa or process water
heating, a heat exchanger must be installed.

2.4 Environmental Responsibility / Disposal

Environmental responsibility is one of the fundamental company
policies of the Group.
R
We regard quality of performance, economy and environmental
responsibility as equal objectives. Environmental protection laws
and regulations are strictly adhered to.
To protect the environment, we use the best possible technology
and materials while also taking into account economic points of
view.
Packaging
All packaging materials used are environmentally-friendly and re-
cyclable.

2.5 Emergency Shutdown

If overheating occurs or the gas supply fails to shut off, close the
manual gas shutoff valve (Fig. 1) located external to the unit.
NOTE: The Installer must identify and indicate the location of the
manual emergency shutoff valve.
Fig. 1 Manual Gas Shutoff Valve
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PRODUCT DESCRIPTION